Device for necking grooved self-locking nut

A technology of self-locking nuts and closing devices, which is applied in the direction of nuts, threaded fasteners, connecting components, etc., can solve the problems of difficult closing processing, etc., and achieve the effect of improving performance and prolonging service life

Active Publication Date: 2014-12-17
河南航天精工制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a closing device for slotted self-locking nuts, aiming to solve the problem of difficult closing processing of slotted self-locking nuts with no internal thread structure at the slot in the prior art

Method used

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  • Device for necking grooved self-locking nut
  • Device for necking grooved self-locking nut
  • Device for necking grooved self-locking nut

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Embodiment of the closing device of the slotted self-locking nut of the present invention: as Figure 1 to Figure 7 As shown, the closing device is composed of a columnar body 2 and three pressure claws 3 uniformly protruding from the outer circumference of the columnar body 1, wherein the columnar body 2 is a cylinder; 1 between the notch end 1-1 and the connecting end 1-2, the extruding end 3-1 exerts the extruding force on the annular groove bottom surface 1-3, and the end face and the side of the extruding end 3-1 pass through The circular chamfered surface processed between the two sides transitions, and the diameter of the smallest inscribed circle at the bottom of the circular chamfered surface of the extrusion end 3-1 of the three pressing jaws 3 is greater than that of the slotted self-locking nut workpiece 1 The inside diameter of the threaded hole at connection end 1-2.

[0019] When the present invention is in use, the columnar main body 2 is first installe...

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PUM

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Abstract

The invention relates to a device for necking a grooved self-locking nut. Raised press claws which are arranged on the circumference of a columnar main body apply extrusion forces at the part of the bottom of a necking groove, which is close to the center of the grooved self-locking nut, to enable the connecting end of the grooved self-locking nut to turn towards the groove mouth end in the radial direction of the grooved self-locking nut, so that the inner bore of the connecting end of the grooved self-locking nut turn is machined to be a tapered hole structure, that is, the internal thread of the connecting end of the grooved self-locking nut turn has a self-locking structure. The device solves the problem that in the prior art, the necking operation of a grooved self-locking nut free of internal thread at the groove part is difficult, and the self-locking structure is not liable to crack during the use of the grooved self-locking nut, so that the service life of the grooved self-locking nut is increased, and the service performance of the grooved self-locking nut is improved.

Description

technical field [0001] The invention relates to the technical field of processing slotted self-locking nuts, in particular to a closing device for slotted self-locking nuts. Background technique [0002] At present, with the rapid development of aerospace aircraft, the requirements for the connection between the substrates of aerospace aircraft engines are getting higher and higher, and the slotted self-locking nut can well meet the connection requirements between some substrates of the engine. [0003] Common slotted self-locking nuts are divided into two types according to whether the slot is processed with internal threads. The closing of the locking thread has achieved the purpose of self-locking. This closing method often causes cracks in the deformation position of the slotted self-locking nut during work, thus invalidating the self-locking performance of the slotted self-made nut and reducing the slotted self-locking performance. The service life of the nut; for slot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D53/24
Inventor 虞玉华王四华梁迎辉胡庆宽
Owner 河南航天精工制造有限公司
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